Boiler



B. wHlrTAM 1,804,907

` BOILER 1926 2 sheets-sheet 1 Filed Dec. 11

; May 12, 1931.

May 12V, A1931. B. BwHn'TAM 1,804,907

' BCILER Filed Dec. 11, 1926 2 Sheets-Sh-eet 2 INVENToR ATTORNEYSPatented May 12, 1931 UNITED STATES PATENT OFFICE BENJAMIN B. WHITTAM, FELIZABETH, NEW JERSEY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, 0FBAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY BOILER Application ledDecember` 11, 1926. Serial No. 154,093.

This invention relates to a boiler furnace in which rows of tubes extendthrough the furnace, between which rows of tubes flames are projectedfrom fuel burners. The invention will be understood from the descriptionin connection with the accompanying drawings, in which Fig. 1 is a frontelevation partly in section along the` line 1 1 of Fig. 2,; and Fig. 2is a side elevation partly in section along the line 2 2 of Fig. 1.Reference character 1 indicates fa steam and water drum located abovethe middle of the furnace and extending longitudinally thereof, andreference character l5 2 indicates two longitudinal side drums at aslightly lower level and parallel to the drum 1. The furnace 3 is belowthe drums 1 and 2, and lower drums 4 parallel to the drum 1 extend alongthe lower portion of the furnace. Transverse Idrums or headers 5 and 6extend along the bottom of the front and rear walls of the furnace,while transverse headers or drums 7 and 8 extend along the upper edgesof the front and rear walls of the furnace. Tubes 7 and 8 connect thetransverse drums or headers 7 and 8 to middle drum 1. A row of tubes 9.extends along the front wall of the furnace and connects the headers 5and 7. A similar row of tubes 10 extends along the rear wall of thefurnace and connects headers 6 and 8. Rows of tubes 11 with their lowerends bent inwardly extend along side walls of the furnace and connectthe drums 2 to the drums 4. The rows of tubes 9, 10 and 11 constitutefurnace wall tubes and are covered with tile or cast iron blocks, asshown at 10 and 11. Rows of tubes 12 extend through the furnace andconnect the drum 1 to the drums 4, these tubes being so bent that themajor portions thereof extend vertically in the furnace, The tubes areso disposed that each row thereof forms a partition extending throughthe furnace. Fuel burners 13 for powdered coal or other fuel are locatedalong the front wall of the furnace, some of the tubes 9 being bent toaccommodate them, in such positions as to pro-l ject flames between thepartitions formed of the rows of tubes 12. These partitions thus formcooling screens which will minimize deposition of molten slag upon anyheating surfaces disposed above the fur nace. E

Rows of circulating tubes 15 connect the drum l to the side drums 2.Tubes 16 extend from the water space near the front ends of the drums 2and tubes 17 extend from the water space near the rear ends of the drums2 to T-unions 18 and 19 below the furnace. Tubes 20 and 21 extend fromthe T-unions 18 and 19 to the ends of the headers 5 and 6. Tubes 22 and'23 also extend from the T-unions 18 and 19 to the ends of headers 24 and25 located below the furnace parallel to the drums 4. Rows of inclinedtubes 26 and 27 covered with tile or cast iron blocks extend from theheaders 724 and 25 to the drums 4 and constitute the 'side walls of the'ash pit of the furnace.

Pipes 31 lead from the steamspace of the drum 1 to the inlet header 32of the superheater. The U-shaped superheater tubes 33extend from theinlet header 32 to the outlet header 34. One of the rows 33 of theU-tubes of the superheater may extend upwardly in contact with the roofof they furnace for supporting this roof. A. pipe 35 extends from theoutlet header of the superheater to a steam main.

, An economizer 36 is located at the rear of the furnace and an airheater 37 is located behind the economizer with conduits for leadingwaste products of combustion from the economizer and air heater to astack in the .usual manner. A dust collector 38 may be located below thewaste products passage from the superheater to the econolnizer and adust pipe 39 with a damper 40 therein leads from the bottom of the dustcollector 38 to the dust collector 41 that is located beneath theeconomizer and air heater. Feed water is led into the bottom of theeconomizer and flows through the same, thence out through the pipe 42from. the upper end of the economizer to the rear ends of the drums 2.

Fuel is fed through the fuel burners 13, so that the flames therefromare projected into the furnace between the partitions formed by the rowsof tubes 12 and the hot products of combustion pass upwardly in thefurnace, thence through the space on each side of the drum 1 betweenthis drum and the side drums 2, contacting with the circulating tubes15, thence into contact with the superheater, thence over the economizertubes and through the air heater to the stack. The feed water enteringthe economizer 36 passes upwardly, thence from the pipe 42 into thedrums 2, thence downwardly through the tubes 16 and 17 to T-unions 18and 19. The water passes from these T-unions through the tubes 20, 21,22 and 23 into headers 24 and 25 and drums 4, 5 and 6, thence upwardlyas shown by the arrows,along the furnace wall tubes 9, 10, 11 and tubes12, where steam is generated, the mixture of steam and water passinginto the longitudinal drums l and 2, and cross drums 7 and 8. Themixture of steam and water that enters the drums 7 and 8 passes throughthe tubes 7 and 8 into the middle drum 1. Water also circulatesdownwardly from the middle drum 1 through the lower tubes of the banks15 'to the side drums 2, as shown by the arrows, and steam and hot waterpasses through the upper tubes of the banks 15 back to the drum 1. Steampasses from the steam space of the drum 1 through the tubes 31 to thesuperheater, thence through the outlet 35 to the steam main. l

I claim: y

. 1. In combination, a furnace having a vertically disposed wall with aplurality of pulverized coal burners therein adaptedlto roject burningfuel into the furnace and engthwise thereof, a steam and water drumextending lengthwise of the furnace, a plurality of vertically disposedrows of water tubes extending lengthwise of the furnace between theburners, and means connecting each of said rows to said drum.

2. In combination, a furnace having a vertically disposed wall with aplurality of burners therein adapted to project burning fuel into thefurnace and lengthwise thereof, a central steam and water drum extendinglengthwise of the furnace, upper side drums connected to said centraldrum and parallel thereto, and a plurality of vertically disposed rowsof water tubes extending lengthwise of the furnace between the @burnersand having their upper ends connected to one of said drums.

3. In combination, a furnace having a vertically disposed wall with'aplurality of burners therein adapted to project burning fuel into thefurnace and lengthwise thereof, a central steam and water drum extendinglengthwise of the furnace, upper side kdrurns connected to 3said centraldrum and parallel thereto, a plurality of vertically disposed rows ofwater tubes extending lengthwise of the furnace between the burners andhaving their upper ends connected to one of said drums, and lower drumsparallel to said upper drums and connected to the lower ends of thetubes inv at least one row.

4. In combination, a furnace having a vertically disposed wall with aplurality of burners thereln adapted to projectA burning fuel into thefurnace and lengthwise thereof, a central steam and water drum extendinglengthwise of the furnace,'upper side ldrums adjacent the side wall ofthe furnace, circulators connecting the side drums t0 the central drum,lower drums parallel to said upper drums, a row of tubes in each of theside walls and connected at opposite ends to said upper and lower drums,and rows of vertically disposed tubes extending lengthwise of thefurnace between the burners and connected at their upper and lower endsto one of said upper and lower drums, respectively.

5. In combination, a furnace having a vertically disposedmwall with aplurality of burners therein adapted to project burning fuel into thefurnace and lengthwise thereof, a central steam and water drum extendinglengthwise of the furnace, upper side drums adjacent the side wall ofthe furnace, circulators connecting the side drums to the central drum,lower drums parallel to said upper drums, a row of tubes in each oftheside walls and connected at opposite ends to said upper and lower drums,rows of vertically f disposed tubes extending lengthwise` of the furnacebetween the burners and connected at their upper and lower ends to oneof said upper and lower drums, respectively, and rows of tubes disposedin the front and rear walls of the furnace and connected at their upperand lower ends to one of said'upper and lower drums, respectively. 'f

6. In combination, a furnace having a vertically disposed wall with aplurality of burners therem adapted to project burning fuel into thefurnace and lengthwise thereof, a central steam and water drum extendinglengthwise of the furnace, upper side drums adjacent the side wall ofthe furnace, circulators connecting the side drums to the central drum,lower drums parallel Kto said upperdrums, a row 'of tubes in each of thesidewalls and connected at yopposite ends to said upper and lower drums,rows of vertically disposed tubes extending lengthwise of the furnacebetween the burners and colinected at their u'pper and lowerl ends to`one of said upper and lower drums, respectively, and means causingthq'hot gases from the burners t0 iow over said circulators.

- BENJAMIN B. WI-I-ITTAM.

